Chemical Tailoring of Hybrid Sol−Gel Thick Coatings As Hosting Matrix for Functional Patterned Microstructures

Falcaro, Paolo; Costacurta, Stefano; Malfatti, Luca; Buso, Dario; Patelli, Alessandro; Schiavuta, Piero; Piccinini, M.; Grenci, Gianluca; Marmiroli, Benedetta; Amenitsch, Heinz; Innocenzi, Plinio

doi:10.1021/am100901m

Cited by 23 publications

(15 citation statements)

References 33 publications

(47 reference statements)

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“…It is important to stress that DXRL is not limited by the diffraction of the patterning wavelength through the lithographic mask, as in the case of conventional UV lithography. 31 Moreover, it has been already reported that DXRL achieves extremely high aspect ratios on hybrid organic-inorganic films without a noticeable increase of the surface roughness in the patterned structure, 32 this feature makes the combination of EISA and DXRL a very powerful tool for fabrication of thick nanostructured lab-on-chip devices. The precision achieved through lithography is clearly visible in the panel (d) of Fig.…”

Section: Materials Fabricationmentioning

confidence: 99%

Nanocomposite mesoporous ordered films for lab-on-chip intrinsic surface enhanced Raman scattering detection

et al. 2011

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Mesoporous nanocomposite materials have been fabricated through integration of evaporation-induced self-assembly and deep X-ray lithography. Micropatterned films made using a mesoporous ordered silica matrix which contains silver nanoparticles have been obtained. The exposure of the mesoporous films to high energy X-rays, which are generated by a synchrotron source, produces several effects: the removal of the surfactant, the densification of the silica backbone and the formation of silver nanoparticles. This integrated process produces a nanocomposite material which has a 2D-hexagonal organized porosity and silver nanoparticles with a sharp size distribution around 5 nm. The patterned nanostructured films have been tested as a lab-on-chip device for intrinsic surface enhanced Raman scattering detection using a solution containing rhodamine 6G in ethanol and measuring Raman response as a function of laser power.

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Section: Materials Fabricationmentioning

confidence: 99%

Nanocomposite mesoporous ordered films for lab-on-chip intrinsic surface enhanced Raman scattering detection

et al. 2011

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“…This technique enables a fast production of radicals within the porous matrix, and the radical species can be effectively used to chemically modify the film composition. The high penetration depth of X-ray radiation allows for a homogeneous effect in the matrix, even for several-micron thick films [22]. The protocol used for Ag NPs growth is resumed in the schematic of Fig.…”

Section: Resultsmentioning

confidence: 99%

In situ growth of Ag nanoparticles in graphene–TiO2 mesoporous films induced by hard X-ray

Malfatti

Carboni

Pinna

et al. 2016

J Sol-Gel Sci Technol

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The controlled growth of Ag nanoparticles into graphene-TiO 2 mesoporous films has been triggered by hard X-ray exposure provided by a synchrotron storage ring. The kinetic process has been studied by UV-visible spectroscopy as a function of the X-ray dose and compared to the nanoparticle growth induced in a bare mesoporous titania matrix. The graphene layers act as a preferential nucleation sites, allowing a faster nucleation of the nanoparticles. Moreover, the growth of larger nanoparticles is also promoted as a function of the exposure dose. The combined bottom-up and top-down approach to fabricate nanocomposites porous films embedding both graphene and plasmonic nanoparticles is expected to be a fundamental tool for the design of new analytical platforms based on the enhancement of the Raman signals. Graphical Abstract

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“…According to previous experiments (Falcaro et al, 2011), the precursor sol was prepared adding 24 cm 3 of PhTES into a mixture of 48 cm 3 of toluene and 24 cm 3 of 2-propanol; after stirring for 10 min at reflux temperature ($ 343 K), 1.5 cm 3 of HCl 1 M was added dropwise. The sol was kept under stirring for 4.5 h in a flask under reflux conditions and then doped with different amounts of fullerene C 60 .…”

Section: Methodsmentioning

confidence: 99%

Hybrid materials with an increased resistance to hard X-rays using fullerenes as radical sponges

Pinna

Malfatti

Piccinini³

et al. 2012

J Synchrotron Radiat

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The protection of organic and hybrid organic-inorganic materials from X-ray damage is a fundamental technological issue for broadening the range of applications of these materials. In the present article it is shown that doping hybrid films with fullerenes C(60) gives a significant reduction of damage upon exposure to hard X-rays generated by a synchrotron source. At low X-ray dose the fullerene molecules act as `radical scavengers', considerably reducing the degradation of organic species triggered by radical formation. At higher doses the gradual hydroxylation of the fullerenes converts C(60) into fullerol and a bleaching of the radical sinking properties is observed.

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Chemical Tailoring of Hybrid Sol−Gel Thick Coatings As Hosting Matrix for Functional Patterned Microstructures

Cited by 23 publications

References 33 publications

Nanocomposite mesoporous ordered films for lab-on-chip intrinsic surface enhanced Raman scattering detection

Nanocomposite mesoporous ordered films for lab-on-chip intrinsic surface enhanced Raman scattering detection

In situ growth of Ag nanoparticles in graphene–TiO2 mesoporous films induced by hard X-ray

Hybrid materials with an increased resistance to hard X-rays using fullerenes as radical sponges

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